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Cisco Unified SIP Phone 3905
Move from Analog to Cost-Effective IP Phones

Cisco Unified SIP Phone 3905
Cisco Products
Cisco Unified IP Phones 3900 Series
Cisco Unified SIP Phone 3905, Charcoal, Standard Handset
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The Cisco Unified SIP Phone 3905 is a cost-effective, entry-level IP phone that addresses the need for basic voice communications with common Cisco Unified Communications features in an attractive design that is also budget-friendly. The phone can fill the communication needs of cubicle, retail, classroom, manufacturing floor and hallway, as well as various wall-mounted deployments.

The single-line Cisco Unified SIP Phone 3905 supports two calls per line. Fixed keys for redial, transfer, and hold/resume, along with a full-duplex speakerphone and two-line display, which comes standard, deliver a more productive, easier-to-use, and flexible endpoint experience. With its dual-port 10/100 Ethernet switch for network and PC connections, the Cisco Unified SIP Phone 3905 offers IT organizations a cost-effective solution to reduce cabling infrastructure and administration costs at the desktop.

The phone is also eco-friendly, taking advantage of reground and recyclable plastics to deliver a more earth-responsible solution.

Move from Analog to Cost-Effective IP Phones

Replace your existing analog and digital phone deployments with affordable IP communication endpoints using the Cisco Unified SIP Phone 3905.

This phone also gives you access to the comprehensive suite of capabilities supported by Cisco Unified Communications Manager.

Increase Interaction and Flexibility
The Cisco Unified SIP Phone 3905 includes interactive features such as:

  • Single-line IP phone with support for up to two concurrent calls
  • Graphical 128x32-pixel monochrome display with a two-way navigation button
  • Full duplex speakerphone for flexibility with hands-free communications
  • Fixed keys for common telephony features: hold, redial, transfer, and mute
  • Foldable, single-position display stand to simplify wall-mount deployments

Help Protect the Environment
The design of this phone includes reground and recyclable plastics to deliver a more environmentally responsible solution.

Get Session Initiation Protocol Support
Protocols and networking features of the Cisco Unified SIP Phone 3905 include:

  • Support for Session Initiation Protocol (SIP)
  • IEEE 10/100 network and PC ports to save cabling infrastructure costs on collocation

Features and Benefits:

Table lists the features and benefits of the Cisco Unified SIP Phone 3905.

Feature Benefit
Ergonomic design The phone offers an easy-to-use interface and provides a traditional telephony-like user experience.
Display A graphical monochrome display with a resolution of 128 x 32 pixels provides a scrollable two-line intuitive access to phone services and configuration.
Foot stand A foldable single-position foot stand offers optimum display viewing and comfortable use of keys.
Wall mountable You can fold the foot stand for wall mounting, with mounting holes located on the base of the phone.
Speakerphone A full-duplex speakerphone allows for flexibility in placing and receiving calls.
Volume control The volume control toggle makes it easy to adjust the volume of the handset, speakerphone, and ringer.
Ethernet switch The phone has a 10/100BASE-T Ethernet connection through two RJ-45 ports, one for the LAN connection and the other for connecting a downstream Ethernet device such as a PC.
Buttons The phone has the following buttons:
  • Select, Back, and Two-Way Navigation
  • Redial, Transfer, and Hold/Resume
  • Standard dial pad
  • Mute, Volume Up/Down, and Speakerphone
Signaling protocol Session Initiation Protocol (SIP) is supported.
Call features
  • Adjustable volume levels
  • Auto barge
  • Call forward
  • Call pickup
  • Call waiting
  • Call transfer
  • Conference
  • Forced Authorization Codes (FAC)
  • Group call pickup
  • Message-waiting indicator
  • Music on hold
  • Private-line automatic ringdown (PLAR)
  • Redial
  • Shared line
Audio codec support G.711a, G.711μ, G.729, G.729a, and G.729ab.
Voice quality Comfort-noise generation (CNG) and voice-activity-detection (VAD) programming is provided on a system basis.
Configuration options
  • Dynamic Host Configuration Protocol (DHCP) client or static configuration
  • Support for online firmware upgrades using Trivial File Transfer Protocol (TFTP)
  • Domain Name System (DNS)
Provisioning and manufacturing
  • Web server for configuration and statistics
  • Real-Time Control Protocol (RTCP) support and monitoring
  • Syslog

Technical Specifications:

Product Specifications
Protocols SIP
Connectivity 10/100BASE-T wired Ethernet LAN port plus switched PC port.
  • 4-MB flash memory
  • 32-MB synchronous dynamic RAM (SDRAM)
Language support Arabic (Arabic area), Bulgarian (Bulgaria), Catalan (Spain), Chinese (China), Chinese (Hong Kong), Chinese (Taiwan), Croatian (Croatia), Czech (Czech Republic), Danish (Denmark), Dutch (Netherlands), English (United Kingdom; prompts only), Estonian (Estonia), French (France), Finnish (Finland), German (Germany), Greek (Greece), Hebrew (Israel), Hungarian (Hungary), Italian (Italy), Japanese (Japan), Korean (Korea Republic), Latvian, Lithuanian, Norwegian (Norway), Polish (Poland), Portuguese (Portugal), Portuguese (Brazil), Romanian (Romania), Russian (Russian Federation), Spanish (Spain), Slovak (Slovakia), Swedish (Sweden), Serbian (Republic of Serbia), Serbian (Republic of Montenegro), Slovenian (Slovenia), Thai (Thailand), and Turkish (Turkey) are supported, but in different phases.
Physical dimensions 8.07 x 5.91 x 2.11 in. (205 x 150 x 53.5 mm)
(in slab mode with the foot stand folded)
Weight 20.96 oz (594.3g)
Power Requirements
Power over Ethernet (PoE) IEEE PoE 802.3af is supported, Class 1.
Local power The phone can also be powered locally with one of the power adapters listed
Temperature Ratings
Operating temperature 32 to 104ºF (0 to 40ºC)
Relative humidity 10 to 95% (noncondensing)
Storage temperature 14 to 140ºF (-10 to 60ºC)
Approvals and Compliance
Cosmetic Cisco Cosmetic Class B
  • UL 60950 Second Edition
  • CAN/CSA-C22.2 No. 60950 Second Edition
  • EN 60950 Second Edition
  • IEC 60950 Second Edition
  • AS/NZS 60950
  • GB4943
Electromagnetic compatibility
  • FCC Part 15 (CFR 47) Class B
  • ICES-003 Class B
  • EN55022 Class B
  • CISPR22 Class B
  • AS/NZS CISPR22 Class B
  • VCCI Class B
  • KN22 Class B
  • CISPR24
  • EN55024
  • EN61000-3-2
  • EN61000-3-3
  • KN 24
  • FCC Part 68 (47CFR) (HAC)
  • Canada-CS-03-HAC
  • Australia AS/ACIF S004, AS/ACIF S040
  • New Zealand- PTC 220 Draft
Regulatory compliance CE markings per directives 2004/108/EC and 2006/95/EC


Download the Cisco Unified SIP Phone 3905 Datasheet (PDF).

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Pricing Notes:

Cisco Products
Cisco Unified IP Phones 3900 Series
Cisco Unified SIP Phone 3905, Charcoal, Standard Handset
Our Price: Request a Quote